表单校验 v-model 绑定的变量，校验失效的解决方案

直接上菜

        <el-form-item label="身份证件类型：" key="certName" prop="certName2">
          <el-select
            size="small"
            v-model.trim="certName"
            placeholder="请选择"
            clearable
            @change="certNameChange"
          >
            <el-option
              v-for="item in documentTypeOptions"
              :key="item.value"
              :label="item.name"
              :value="item.value"
            ></el-option>
          </el-select>
        </el-form-item>

data数据

      documentCallBackList1: {
        fileType: "",
        certName: "",
        certEffectDate: "",
        certExpireDate: "",
        certId: "",
        certNo: